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Monitoring of water table oscillation due to reservoir impoundment: The case of Tres Irmaos reservoir and the city of Pereira Barreto, Brazil

机译：监测由于水库蓄水引起的地下水位振荡：以Tres Irmaos水库和巴西Pereira Barreto市为例

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Hydrogeological studies have been carried out to evaluate the impacts, prior to the reservoir impoundment, of water table oscillations on phreatic aquifer in influence areas surrounding hydroelectric dam reservoirs, to determine preventive, mitigative and corrective actions. These studies started out from the detection of environmental problems associated to land use and occupation (soil saturation, well walls collapse, settlings of structures, flooding of depression areas) in influential areas of several reservoirs installed in the decades of 1960, 70 and 80 in the state of Sao Paulo, Brazil. A brief history of the main cases is presented, as well as the studies of hydrogeological impacts concerning monitored reservoirs, taking as an example, the Brazilian case of Pereira Barreto city(Tres Irmaos hydroelectric reservoir), due to its special characteristics. Results of water table depth monitoring, before, during and after Tres Irmaos reservoir impoundment, are presented in this paper. All these studies are included in a regional monitoring and management plan of the environmental consequences of dam reservoir impoundment and operation, which is in progress.
机译：在水库蓄水之前，已经进行了水文地质研究，以评估水位振荡对水力发电大坝水库周围影响区域的潜水含水层的影响，以确定预防，缓解和纠正措施。这些研究始于在1960年，20世纪70年代和80年代安装的几个水库的影响区域中与土地使用和占用有关的环境问题（土壤饱和度，井壁倒塌，结构沉降，凹陷区域的洪水）的发现。巴西圣保罗州。介绍了主要案例的简要历史，以及有关受监测水库的水文地质影响的研究，以巴西Pereira Barreto市（Tres Irmaos水电站）的案例为例，由于其独特的特性。本文介绍了Tres Irmaos水库蓄水之前，之中和之后的地下水位监测结果。所有这些研究都已纳入对大坝水库蓄水和运营的环境影响的区域监测和管理计划中，该计划正在进行中。

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